Method of attaching an opening member to a container



S p 6, 1938- c. J. JOHANSSON 2,129,583

METHOD OF ATTACHING AN'OPENING MEMBER TO A CONTAINER Filed Feb. 15, 1937MQW Patented Sept. 6, 1938 UNITED STATES PATENT OFFICE Carl J.Johansson, Savedalen, Sweden Application February 15, 1937, Serial No.125,903 In Sweden February 20, 1935 2 Claims.

This invention relates to such tin boxes which are provided withparallel scored or swaging lines in one of the sides, for instance thecover, embracing a comparably narrow strip the breaking 5 away of whichwill remove said side of the box and make its contents accessible. Morespecifically this invention has reference to boxes of this class inwhich a rivet inserted through said side of the box between the twoscored or swaging lines projects perpendicularly from the side so as toadmit a key to be applied to the rivet and revolved, whereby the stripis broken and wound up around the shaft of the key. Such rivets usuallyare fastened at the one end of said strip 15 between a. head of therivet on the innerside of the box and a tightening collar mounted uponthe rivet against the outside of the box. As it is indispensable forthe-durable upkeep of the preserved ingredient that the attachment ofsaid rivet in the box side is air-tight such device will be ratherintricate, which makes it too costly for general purposesnotwithstanding its handiness and eflectiveness.

The main object of this invention is to provide for a simplified openingdevice of the class mentioned without reducing its effectivity and as aconsequence to facilitate its employment on account of a decrease in thecosts of manufacture.

The principal character of this invention lies therein that the knownloosely applied collar is substituted by an upset portion of theexteriorly .projecting shaft of the rivet so that a collar is producedwhich is integral with the rivet and leaves the exterior end of theshaft projecting 35 like a pin for the key just as does the rivet in theknown types of similar means.

In the accompanying drawing an embodiment of this invention isillustrated, whereby Figure 1 represents an upper view of a prcservingtin-box provided with the improved breaking up attachment.

Figure 2 in a partially broken elevation view of the same box.

Figure 3 shows on an enlarged scale an eleva- 45 tion section of aportion of the box with the improved opening rivet inserted through thebox side but not yet finally secured thereto.

Figure 4 shows the same opening rivet in nonfinished condition viewedfrom its outer end,

50 and Figure 5 is a view similar to Figure 3 but with the attaching ofthe rivet completed.

In the drawing, I designates the narrow strip or tear section which isembraced by the two 55 scored or swaging lines ID in the cover 2 of apreserving tin-box. 3 designates the pin-like end of the breaking uprivet which is secured to cover 2 at the one end of the strip I.

In Figure 3 the rivet 8 is shown on place in the cover 2 but preparatoryto the completing of its attachment. method for said completing also. 4designates diagrammatically a tool comprising two claws or punches whichare applied against the shoulder presented by the thickened root portion6 of the rivet shaft which is inserted through a hole 5 in the cover 2.In Figure 4 the thickened shaft portion 6 is exemplified to be square incrosssection so that the aforesaid shoulder is formed by the differencein configuration between the squared root portion 6 and the cylindricalend portion 3. However, the cross-section of the root portion 6 isarbitrary, and the only requisite is that it is larger than is thecross-section of the end portion 3 so that the aforesaid shoulderappears thereon.

Between the head I of the rivet and the underside of the cover 2 thereis applied a thin sheet 8 of some easy fusible soldering metal for thepurpose mentioned below. Having inserted the rivet into the hole 5 inthe cover 2, the tool 4' is applied against the shoulder of the rivet,and blows or pressure are exerted upon said tool so as to upset thethickened root portion 6 of the rivet shaft against the upper side ofthe cover 2 forming a collar 60 integral with the projecting pin-likeend 3 of the rivet which makes the passage through the hole 5 around therivet air tight closed simultaneously as the lower integral rivet head Iis drawn tight against the under side of the cover. When applying asoldering hammer or such like on the solder 8 this will fuse and fill upany passage through the hole 5 thus establishing a complete air tightjoint around the rivet as illustrated by 80 in Figure 5.

What I claim isi 1. The method of attaching an opening member to thetear section of a container having an opening consisting in arranging afusible metal washer on the shank of a headed rivet, inserting saidshank through the opening in the tear section with the washer in contactwith the inner surface of the tear section, upsetting a portion of theshank to provide a collar in contact with the other surface of the tearsection, and applying heat to the washer to fuse the metal thereof toform an air tight joint.

2. The method of attaching an opening member to the tear section of acontainer having an opening, consisting in arranging a fusible metalwasher on the enlarged shank portion of a headed rivet, inserting saidshank portion through the opening in the tear section with the washer incontact with the inner surface of the tear section, upsetting theenlarged shank portion to provide a collar in contact with the othersurface of the tear section, and applying heat to the washer to fuse themetal thereof to form an air tight joint.

CARL J. JOHANSSON.

This figure demonstrates the

